Standard X-Plane axes assignments are much different than what is happening in the Saab. X-Plane assigns functionality to an axis, ie. throttle. In the Saab we need to know which axis your joystick is using (assigned as none) in order to make the condition levers work properly. That index can change between sim sessions, loading aircraft, etc. I'm not saying that it is guaranteed to change, but it's also not guaranteed to be the same. Some people may change hardware between sessions. There are just too many variables to be able to save the index and guarantee that it will be correct the next time around.